In the UK students take exams called GCSEs when they are 16. Some students leave school at that age, but if you decide to stay on you take two years to study for exams called A levels. The A levels are meant to prepare you for starting at university.

The A Level (Advanced Level) is a subject-based qualification conferred as part of the General Certificate of Education, as well as a school leaving qualification offered by the educational bodies in the United Kingdom and the educational authorities of British Crown dependencies to students completing secondary or pre-university education. A number of countries, including Singapore, Kenya, Mauritius and Zimbabwe have developed qualifications with the same name as and a similar format to the British A Levels. Obtaining A Level or equivalent qualifications is generally required for university entrance...

The IBM System/370 (S/370) was a model range of IBM mainframe computers announced on June 30, 1970 as the successors to the System/360 family. The series mostly maintained backward compatibility with the S/360, allowing an easy migration path for customers; this, plus improved performance, were the dominant themes of the product announcement. Improvements over the S/360 first released in the S/370 model range included:
the block multiplexor channels introduced on the most recent high end System/360 systems;
standard dual-processor capability;
"monolithic main memory" on the model 145, based on...

Is your doubt why in dimensional regularization we switch to $d-\epsilon$ and set $d=4$? The value for $d$ is just the dimension of spacetime. The $\epsilon$ has to do with isolating the divergence. — user162069633 mins ago

"Portuguese (português or, in full, língua portuguesa) is a western Romance language and the sole official language of Portugal, Brazil, Cape Verde, Guinea-Bissau, Mozambique, Angola, and São Tomé and Príncipe.["

The Portuguese of Goa refers to the Portuguese language spoken in Goa, India.
== Background ==
The history of the Portuguese dialect began in Goa due to Portuguese rule in the region that lasted for over 450 years. During the existence of the Portuguese State of India, Portuguese was used extensively, in government or in the education system. In addition to the official government media, it was also used by [[missionaries in their missions, although the Portuguese language coexisted with other languages.
== After 1961 ==
However, after the end of Portuguese rule in Goa, brought about by an Indian...

Anonymous

Or, maybe, it was a side-effect of colonizing Goa....the Portugese guys had to go back with "doubt"

@JohnRennie I'm sure most of us knew about the Portuguese colonization of Goa. It was just improbable that the OP is from Goa and also knows Portuguese. I do have some friends in Goa and I'm pretty sure that their families do not know the Portuguese language.

@0ßelö7 when the Normans invaded all the posh people switched to speaking French, while the serfs carried on speaking old English. Inevitably a lot of the Old English words that survived covered the more, erm, basic aspects of life :-)

@0ßelö7 for example the Old English word scītan just meant to defecate. It was only after the Norman invasion that it ended up as a swear word.

> In the 16th century an anonymous monk was reading through the monastery copy of De Officiis (a guide to moral conduct) when he felt compelled to express his anger at his abbot. O d fuckin Abbot, he scrawled in the margin of the text.

@Blue "You can't make better things till you break things." Oddly enough Stack Overflow was built to differ from certain feature of the USENET and forum model. One of those thing was exactly the fact that in the then existing formats the same questions were asked and answered over and over again, making it hard to run down either all of the answers or a canonical answer.

The hard part is showing that all vector fields have at most countably many zeros

Wait no

What was it

I forget

something like that

Anonymous

5:26 PM

@dmckee I don't disagree with that. I meant something else. I was saying that unless SE experiments with the site features, they'll never know what suits the site members best. Being stagnant is not a good sign. If something goes wrong with the experiment they can always go back.

Anonymous

I know it's not easy to make changes. Neither is it easy to avoid problems due to changes. But it can be worth a try.

"Push $p$ along $f$" in the following sense; let $i_1$ be the diffeomorphism isotopic to identity of $M$ which takes $p_0 := p$ to some $p_1 \in U_0 \cap U_1$ and leaves $M$ invariant outside a ball in $U_0$... fuck

Energy is a really horrid concept imo. It feels easy to manipulate mathematically and use but when some says what is it it kinda gets tricky. One sort of definition would be 'the capacity an object has to do work' that is the more energy an object has the more work it is able to do but I haven't really been happy with any definitions presented to me

@Slereah this book has a nice proof of the existence of convex normal hoods

Anonymous

@Abcd After sugars are produced in photosynthesis, these sugars must be transported to other parts of the plant for use in the plant's metabolism. "Transport"....there's proof that energy denotes capacity to do work. There is lot of indirect stuff going on. That "sugar" is a condensed form of energy, really.

@Abcd For chemical energy, the work it "can do" is e.g. if you enclose the substance in a piston and then trigger an exothermic chemical reaction, the piston gets raised by the pressure of the heated material. That's how engines work.

Anonymous

6:32 PM

@Abcd There is a force being applied. But the "leaves" are not the ones applying it.

After years of studying physics I am suddenly struck by the question - What is energy? Wikipedia defines it thus:
Energy is often understood as the ability a physical system has to do
work on other physical systems.
(1)
If that is the case, what is work?
In physics, work is the amou...

Perhaps we need to stray away from setting the definition of work as only applicable to Force$\times$distance.

Anonymous

@Abcd Leaves don't necessarily have to spend all their energy. Some of the condensed energy produced is used to transport the sugars to other parts of the plant. So, there's work involved. If you really want to, you can think of a leaf pumping sugars to other parts of the plant. So, crudely a leaf does work while pumping sugar. But it is much more complicated than that.

I believe some old questions would be quickly closed if asked today (e.g., What is sound and how is it produced? in my opinion is too broad and shows too little prior research effort).
What should we do?
always leave them alone, 5+ years is history;
consider voting to close, but only if ther...